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Patented Dec. 31,1918.

v H. S. FLANEGIN.

PULVERIZED FUEL BURNER.

APPLICATION FILED HAY l5. I915.

UNITED STATES PATENT OFFICE.

HARRY S. FLANEGIN, OF POTTSVILLE, PENNSYLVANIA, ASSIGNOR TO THE EASTERN STEEL COMPANY, OF POTTSVILLE, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

P-ULVERIZED-FUEL BURNER.

Patent-ed Dec. 31, 1918.

Application tiled Kay 15'. 1916. Serial No. 97,666.

and useful Improvement in lulverized-l net Burners; and I do hereby declarethe following to be a full, clear. and exact description thereof. Y

My invention relates to a pulverized fuel feeder. i

The object of my invention is to provide a feeder of this character, which is simple in construction. and which provides for the automatieal feeding; of pulverized fuel from a supply-bin to be injected under high pressure in a uniform, continuous feed. and

adapted to be readily adjusted to different positions so thatthe blast can he directed to any given [)Oillbill the furnace. A further object of my invention is to provide for the prevention of the coal from spreading" too much, thereby making a sharper tlainc and causing a more intense heat; in a confined lo entity to cut or nielt down the steel. where the device is used in a steel-melting furnace.

To these ends my invention consists. gen' erally stated, in a coal-bin for containing the pulverized coal, with a. pipe leading therefrom to a vacuuin-cliainber,a nozz e through which air under high pressure is forced.

thereby creating a partial vacuum in said chamber, and by'suction drawing the put:

H fully set forth and claimed.

in the drawing, the numeral 2 designates the front wall of a suitable furnace. such as an open-hearth furnace, having the inlet 3 for the discharge of the pulverized fuel. Supported in front of the furnace is the "ether with other features all as hereinafter ,troley track 4, whiclrsupports the-trolley 5 with the 'wheels 6 traveling on said track. The swivel pin 7 is connected to the. trolley. and said swivel pin supports the vacuumehainber 8. This vaciaim-chamber is connected up by the flexible pi ie 9 to the lower end 10 of the coal-bin ll. his bin contains the pulverized coal or other fuel, and the fuel fed in t'he top moves down to the coutracted end-portion 10, from whence it is drawn off by the pipe 9. 1 j

Extending within the vacuuui-chamhci- S is the nozzle 12, which is connected up by the elbow 13 with the air-supply pipe 14, controlled by the valve 15. connected up with an air compressor so that air under high pressure is delivered by the pipe 14 to the nozzle 12.

A coupling 16 connects the VilCllLllll Ciltlllther 8 up with the delivery pipe 17, which extends a suitable distance to bring it into This pipe 14 is proper relation with the furnace opening 3. 7

A coupling 18 connects the coupling 16 with the outer auxiliary injecting pipe 19 surrounding the pipe 17, said pipe 19 pref erably extending slightly beyond the piie 17. This, however, is not essential as tic only requirement is that the delivery pipe does not extend beyond the. surrounding pipe. Air-supply pipe 20 for admitting air at any desired pressure is connected up to the coupling 18, and air is injected by said pipe 20 into the space between the pipes 17 and 19.

In the operation of the device, when the device has been properly adjusted with reference to the opening 3. the air is turned on by opening the valve 15 the proper amount. and the air lllJGtftQti through the nozzle 1; creates a partial vacuum in the vacuumchamber b, and thiscrcatcs a suction in the pipe 9 so that the pulverized fuel is drawn from the contracted end 10 of the inn and delivered to the vacuum-chamhcr 8. whence it passes into the pipe 17 and is forced for- T ward by the air at any desired pressure issuing: from the nozzle 12. At the same time, air is admitted by the pipe 20 to the pi i0 19. and this air sun'oundin'g the fuel inJcctcd from the pipe 17 tends to confine the coal and prevent it from spreading, thereby giv iug a more concentrated flame and musing a more intense heat ina confined locality to cut or melt down the steel. The auxiliary injecting pipe 19 admits air for discliarcgiiug the fuel into the furnace, the air for coinbustion purposes being, sup died by a separate flue. Owing to the t exibility of the pipe. 9 and the swivel 7, the device is quickly and readily moved to direct the blast to any given point, and the trolley permits of the hurnerbeing moved in and out,

By theahove apparatus, therefore. i provide a pulvcrizci'l fuel fcrdei' adapted to inject the fuel by high pressure injection-div :iud, at'thc same time, the secondary injection-air surrounds the injected fuel, and prevents it from spreading unduly. F urthermore, by my improved fuel feeder, I obtain a uniform, continuous feed so that the heat is maintained without sudden fluctuations and, consequently, there is a saving in time and fuel.

It is apparent that by adjusting the valve 15, thevquantity of coal fed to the furnace maybe varied.

What I claim is: 1. In a fuel burner, in combination With a receptacle for containing pulverized fuel and a vacuum chamber rovided with a discharge pipein communication therewith, of an auxiliarypipe carrying injection air surrdimding sald delivery pipeapproximately its entire length, a carrier adapted to move in approximately horizontal plane, and means to secure said carrier'and said vacuum.

chamber in swivel relation, substantially as,

charge pipe in communication therewith, of an auxiliary pipe carrying in ection air and surrounding said delivery 'pip'e approximately its entire length, a carrier adapted to move inan approximately horizontal plane,

, means to secure said carrier and said vacuum chamber in swivel relatiom and a controlling means for controlling the vacuum in said chamber, substantially as described.

In testimony whereof, I the said HARRY S. FLANEGIN have hereunto set my hand.

. HARRY S. FLANEGIN. Witnesses:

LOUIS Honsrnm, P; H. lllnunmsn'n. 

